CN108964080A - TSC operation/cutting method, terminal device and computer readable storage medium - Google Patents
TSC operation/cutting method, terminal device and computer readable storage medium Download PDFInfo
- Publication number
- CN108964080A CN108964080A CN201810927971.9A CN201810927971A CN108964080A CN 108964080 A CN108964080 A CN 108964080A CN 201810927971 A CN201810927971 A CN 201810927971A CN 108964080 A CN108964080 A CN 108964080A
- Authority
- CN
- China
- Prior art keywords
- tsc
- value
- current
- target
- cutting method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
Abstract
The invention discloses a kind of TSC operation/cutting methods, terminal device and computer readable storage medium, the present invention is by terminal device when receiving switching signal, judge whether capacitance present residual voltage value is less than current electric grid voltage peak, when the capacitance present residual voltage value is less than the current electric grid voltage peak, judge the phase difference value of current electric grid voltage-phase and capacitance present phase whether within the scope of predetermined angle, when the phase difference value is within the scope of the predetermined angle, pulse signal is sent to target thyristor switchable capacitor TSC, so that target TSC is connected after receiving pulse signal, it can be improved the accuracy of zero passage detection, shorten the switching time, improve switching speed and efficiency, and it avoids generation investment and shoves and power grid is impacted.
Description
Technical field
The present invention relates to compensation power system reactive power field more particularly to a kind of TSC operation/cutting method, terminal device and calculating
Machine readable storage medium storing program for executing.
Background technique
Thyristor switchable capacitor (Thyristor Switched Capacitor, TSC) is compensation power system reactive power
One of efficient apparatus, compare static reactive generator (Static Var Generator, SVG) and contactor switched capacitor
The methods of, cost performance and reliability have greater advantage, thus are widely used.Using a capacitor as reactive compensation
Prototype part in, according to different use occasions, there is two kinds of connection types of Y-shaped and triangle, no matter in which kind of loadtype,
Triangle connection is most widely used.In the connection of capacitor triangle, fling-cut switch (thyristor), which has, controls (3 in angle
Thyristor) and angle outside control (2 thyristors) two ways, because control mode only needs 2 thyristors outside angle, and structure is simple,
Line is convenient, therefore its application is the most convenient.The fling-cut switch for controlling three-phase capacitor outside 2 traditional thyristor angles has lower Lieque
It falls into or insufficient: 1, using the voltage difference of capacitor and power grid as judging that object, low voltage difference (< 10V) existed as investment condition
Zero detection is inaccurate, is also easy to produce switching inrush current phenomenon；2, after capacitor excision, because capacitor residual voltage is higher than network voltage peak value, cause
Next time, investment must wait long period (>=20ms), when capacitance voltage is lower than network voltage peak value, can just continue to put into, otherwise
By force investment may generate it is larger shove, power grid is caused to impact.3, without harmonic protection function, capacitor harmonic current is excessive
When, capacitor and thyristor are easy to damage.
Above content is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that above content is existing skill
Art.
Summary of the invention
The main purpose of the present invention is to provide a kind of TSC operation/cutting method, terminal device and computer readable storage medium,
Aim to solve the problem that for pressure differential method in the case where harmonic wave is larger or big interference, zero passage detection is inaccurate, is also easy to produce the skill that switching shoves in the prior art
Art problem.
To achieve the above object, the present invention provides a kind of TSC operation/cutting method, the TSC operation/cutting method the following steps are included:
Terminal device judges whether capacitance present residual voltage value is less than current electric grid Voltage Peak when receiving switching signal
Value；
When the capacitance present residual voltage value be less than the current electric grid voltage peak when, judge current electric grid voltage-phase and
Whether the phase difference value of capacitance present phase is within the scope of predetermined angle；
When the phase difference value is within the scope of the predetermined angle, arteries and veins is sent to target thyristor switchable capacitor TSC
Signal is rushed, so that target TSC is connected after receiving pulse signal.
Preferably, described when the phase difference value is within the scope of the predetermined angle, according to predetermined pulse transmit cycle
Pulse signal is issued, after target thyristor switchable capacitor TSC is connected, the TSC operation/cutting method further include:
The loop current instantaneous value for acquiring the target TSC in real time calculates according to the loop current instantaneous value and obtains electricity
Flow virtual value and electric current total harmonic distortion；
When the electric current total harmonic distortion is greater than default aberration rate, zero passage excision and humorous is carried out according to the current effective value
Wave transfinites protection.
Preferably, described when the electric current total harmonic distortion is greater than default aberration rate, it is carried out according to the current effective value
Zero passage excision and harmonic wave transfinite after protection, the TSC operation/cutting method further include:
When detecting no switching signal, stop issuing the pulse signal, and record current phase parameter, for next time
Switching uses.
Preferably, described when detecting no switching signal, stop issuing the pulse signal, and record current phase ginseng
Number, before next switching use, the TSC operation/cutting method further include:
The target voltage values for acquiring the target TSC in real time are right when the target voltage values are greater than predetermined voltage threshold
The target TSC carries out overvoltage protection.
Preferably, the target voltage values for acquiring the target TSC in real time, when the target voltage values are greater than default electricity
When pressing threshold value, after carrying out overvoltage protection to the target TSC, the TSC operation/cutting method further include:
The target current value for acquiring current electric grid voltage value and the target TSC, according to the current electric grid voltage value and
The target current value calculates the actual capacity for obtaining the target TSC；
When the actual capacity is less than preset capacity, alarm prompt is carried out.
Preferably, described when receiving switching signal, judge whether capacitance present residual voltage value is less than current electric grid voltage
Before peak value, the TSC operation/cutting method further include:
Obtain current electric grid voltage-phase value, capacitance present phase value and current pulse length；
Phase difference value is calculated according to the current electric grid voltage-phase value and the capacitance present phase value, is worked as according to described
Prepulse width determines predetermined pulse transmit cycle and current electric grid voltage peak.
Preferably, described when the phase difference value is within the scope of the predetermined angle, to target thyristor series capacitor
Device TSC sends pulse signal and specifically includes so that target TSC is connected after receiving pulse signal:
When the phase difference value is within the scope of the predetermined angle, according to determining predetermined pulse transmit cycle to target
TSC sends pulse signal, so that target TSC carries out conducting after receiving pulse signal
Preferably, described when receiving switching signal, judge whether capacitance present residual voltage value is less than current electric grid voltage
After peak value, the TSC operation/cutting method further include:
When the capacitance present residual voltage value is not less than the current electric grid voltage peak, the judgement capacitance present is returned
Whether residual voltage value is less than the step of current electric grid voltage peak.
In addition, to achieve the above object, the present invention also proposes a kind of terminal device, the terminal device include: memory,
Processor and the TSC switching program that is stored on the memory and can run on the processor, the TSC switching program
The step of being arranged for carrying out TSC operation/cutting method as described above.
In addition, to achieve the above object, the present invention also proposes a kind of computer readable storage medium, described computer-readable
TSC switching program is stored on storage medium, the TSC switching program realizes TSC as described above when being executed by processor
The step of operation/cutting method.
TSC operation/cutting method proposed by the present invention judges that capacitance present is residual through terminal device when receiving switching signal
Whether pressure value is less than current electric grid voltage peak, when the capacitance present residual voltage value is less than the current electric grid voltage peak,
The phase difference value of current electric grid voltage-phase and capacitance present phase is judged whether within the scope of predetermined angle, when the phase difference
When value is within the scope of the predetermined angle, pulse signal is sent to target thyristor switchable capacitor TSC, so that target TSC exists
It is connected after receiving pulse signal, can be improved the accuracy of zero passage detection, shortened the switching time, improve switching speed
And efficiency, and avoid generation investment and shove and power grid is impacted.
Detailed description of the invention
Fig. 1 is the terminal device structural schematic diagram for the hardware running environment that the embodiment of the present invention is related to；
Fig. 2 is the flow diagram of TSC operation/cutting method first embodiment of the present invention；
Fig. 3 is TSC operation/cutting method voltage-phase decision circuitry schematic diagram of the present invention；
Fig. 4 is the flow diagram of TSC operation/cutting method second embodiment of the present invention；
Fig. 5 is the flow diagram of TSC operation/cutting method 3rd embodiment of the present invention；
Fig. 6 is the flow diagram of TSC operation/cutting method fourth embodiment of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The solution of the embodiment of the present invention is mainly: the present invention, when receiving switching signal, is sentenced by terminal device
Whether disconnected capacitance present residual voltage value is less than current electric grid voltage peak, when the capacitance present residual voltage value is less than the current electric grid
When voltage peak, judge the phase difference value of current electric grid voltage-phase and capacitance present phase whether within the scope of predetermined angle,
When the phase difference value is within the scope of the predetermined angle, pulse signal is sent to target thyristor switchable capacitor TSC, with
Target TSC is connected after receiving pulse signal, can be improved the accuracy of zero passage detection, shortens the switching time, mentions
Switching speed and efficiency have been risen, and has avoided generation investment and shoves and power grid is impacted, pressure differential method in the prior art has been solved and exists
Under harmonic wave is larger or big interference, zero passage detection is inaccurate, is also easy to produce the technical issues of switching shoves.
Referring to Fig.1, Fig. 1 is the terminal device structural schematic diagram for the hardware running environment that the embodiment of the present invention is related to.
As shown in Figure 1, the terminal device may include: processor 1001, such as CPU, communication bus 1002, user's termination
Mouth 1003, network interface 1004, memory 1005.Wherein, communication bus 1002 is logical for realizing the connection between these components
Letter.User's end interface 1003 may include display screen (Display), input unit such as keyboard (Keyboard), optional user
End interface 1003 can also include standard wireline interface and wireless interface.Network interface 1004 optionally may include standard
Wireline interface, wireless interface (such as WI-FI interface).Memory 1005 can be high speed RAM memory, be also possible to stable deposit
Reservoir (non-volatile memory), such as magnetic disk storage.Memory 1005 optionally can also be independently of aforementioned place
Manage the storage device of device 1001.
It will be understood by those skilled in the art that terminal device structure shown in Fig. 1 is not constituted to the terminal device
It limits, may include perhaps combining certain components or different component layouts than illustrating more or fewer components.
As shown in Figure 1, as may include operating system, net in a kind of memory 1005 of computer readable storage medium
Network communication module, user terminal interface module and TSC switching program.
Terminal device of the present invention calls the TSC switching program stored in memory 1005 by processor 1001, and executes
It operates below:
When receiving switching signal, judge whether capacitance present residual voltage value is less than current electric grid voltage peak；
When the capacitance present residual voltage value be less than the current electric grid voltage peak when, judge current electric grid voltage-phase and
Whether the phase difference value of capacitance present phase is within the scope of predetermined angle；
When the phase difference value is within the scope of the predetermined angle, arteries and veins is sent to target thyristor switchable capacitor TSC
Signal is rushed, so that target TSC is connected after receiving pulse signal.
Further, processor 1001 can call the TSC switching program stored in memory 1005, also execute following behaviour
Make:
The loop current instantaneous value for acquiring the target TSC in real time calculates according to the loop current instantaneous value and obtains electricity
Flow virtual value and electric current total harmonic distortion；
When the electric current total harmonic distortion is greater than default aberration rate, zero passage excision and humorous is carried out according to the current effective value
Wave transfinites protection.
Further, processor 1001 can call the TSC switching program stored in memory 1005, also execute following behaviour
Make:
When detecting no switching signal, stop issuing the pulse signal, and record current phase parameter, for next time
Switching uses.
Further, processor 1001 can call the TSC switching program stored in memory 1005, also execute following behaviour
Make:
The target voltage values for acquiring the target TSC in real time are right when the target voltage values are greater than predetermined voltage threshold
The target TSC carries out overvoltage protection.
Further, processor 1001 can call the TSC switching program stored in memory 1005, also execute following behaviour
Make:
The target current value for acquiring current electric grid voltage value and the target TSC, according to the current electric grid voltage value and
The target current value calculates the actual capacity for obtaining the target TSC；
When the actual capacity is less than preset capacity, alarm prompt is carried out.
Further, processor 1001 can call the TSC switching program stored in memory 1005, also execute following behaviour
Make:
Obtain current electric grid voltage-phase value, capacitance present phase value and current pulse length；
Phase difference value is calculated according to the current electric grid voltage-phase value and the capacitance present phase value, is worked as according to described
Prepulse width determines predetermined pulse transmit cycle and current electric grid voltage peak.
Further, processor 1001 can call the TSC switching program stored in memory 1005, also execute following behaviour
Make:
When the phase difference value is within the scope of the predetermined angle, according to determining predetermined pulse transmit cycle to target
TSC sends pulse signal, so that target TSC is connected after receiving pulse signal.
Further, processor 1001 can call the TSC switching program stored in memory 1005, also execute following behaviour
Make:
When the capacitance present residual voltage value is not less than the current electric grid voltage peak, the judgement capacitance present is returned
Whether residual voltage value is less than the step of current electric grid voltage peak.
Technical solution provided in this embodiment judges that capacitance present is residual through terminal device when receiving switching signal
Whether pressure value is less than current electric grid voltage peak, when the capacitance present residual voltage value is less than the current electric grid voltage peak,
The phase difference value of current electric grid voltage-phase and capacitance present phase is judged whether within the scope of predetermined angle, when the phase difference
When value is within the scope of the predetermined angle, pulse signal is sent to target thyristor switchable capacitor TSC, so that target TSC exists
It is connected after receiving pulse signal, can be improved the accuracy of zero passage detection, shortened the switching time, improve switching speed
And efficiency, and avoid generation investment and shove and power grid is impacted.
Based on above-mentioned hardware configuration, TSC operation/cutting method embodiment of the present invention is proposed.
It is the flow diagram of TSC operation/cutting method first embodiment of the present invention referring to Fig. 2, Fig. 2.
In the first embodiment, the TSC operation/cutting method the following steps are included:
Step S10, terminal device judges whether capacitance present residual voltage value is less than current electric grid when receiving switching signal
Voltage peak.
It should be noted that the switching signal that the terminal device receives can be the switching that detection input receives
Signal, is also possible to the switching signal automatically generated when preset condition reaches, can also be and receives by other means certainly
Switching signal, the present embodiment is without restriction to this.
It is understood that by judging whether capacitance present residual voltage value is less than current electric grid voltage peak and can judge to work as
Whether the preceding moment carries out switching, different from passing through in the present embodiment current using the voltage difference of capacitor and power grid as object is judged
Capacitor residual voltage value, that is, as the condition for putting into capacitor, will not generate investment and shove as object judge, avoid with capacitor with
Condition of the voltage difference of power grid as investment capacitor, in the case where harmonic wave is larger or big interference, zero passage detection is inaccurate, is also easy to produce investment
The case where shoving improves the safety that capacitor and power grid use.
Correspondingly, before the step S10, the TSC operation/cutting method is further comprising the steps of:
Obtain current electric grid voltage-phase value, capacitance present phase value and current pulse length；
Phase difference value is calculated according to the current electric grid voltage-phase value and the capacitance present phase value, is worked as according to described
Prepulse width determines predetermined pulse transmit cycle and current electric grid voltage peak.
It should be understood that by the thyristor current flows sampling circuit samples built in the terminal device and can generally count
Thyristor current flows are calculated, the capacitance voltage sample circuit built in the terminal device, the voltage and electricity of real-time calculable capacitor are passed through
Hold, after obtaining current electric grid voltage-phase value, capacitance present phase value and current pulse length, according to the current electric grid electricity
It presses phase value and the capacitance present phase value to calculate phase difference value, determines that predetermined pulse emits according to the current pulse length
Period and current electric grid voltage peak, the predetermined pulse transmit cycle are the pre-set impulse ejection period, described default
The impulse ejection period is less than the current pulse length in setting.
In the concrete realization, the predetermined pulse transmit cycle can be set to 20ms, be in predetermined pulse transmit cycle
In 20ms, with the rate real-time detection three-phase power grid voltage polarity and phase and capacitor residual voltage polarity not less than 64 times；Work as reception
To after switching signal, by current electric grid instantaneous voltage compared with capacitor residual voltage, using capacitor residual voltage polarity as reference point, work as power grid
When voltage-phase is in specific region, i.e., trigger signal is issued to thyristor, stable no-flashy-flow switching may be implemented.
Correspondingly, after the step S10, the TSC operation/cutting method is further comprising the steps of:
When the capacitance present residual voltage value is not less than the current electric grid voltage peak, the judgement capacitance present is returned
Whether residual voltage value is less than the step of current electric grid voltage peak.
It is understood that when the capacitance present residual voltage value is not less than the current electric grid voltage peak, i.e., currently
When network voltage peak value is higher than the capacitance present residual voltage value, need that capacitance present residual voltage value is waited to be reduced to the current electric grid
After voltage peak, then carry out the judgement of phase difference value and predetermined angle, it is ensured that the accuracy of switching.
Step S20, when the capacitance present residual voltage value is less than the current electric grid voltage peak, judge current electric grid electricity
Press the phase difference value of phase and capacitance present phase whether within the scope of predetermined angle.
It should be noted that the current electric grid voltage peak is the highest of current electric grid voltage voltage in periodic regime
Value, the phase difference value are the difference of the current electric grid voltage-phase and the capacitance present phase, and the predetermined angle is
The angle of preset phase can be the angle value of default, be also possible to the angle adjusted according to practical situations, when
It so can also be predetermined angle determining by other means, the present embodiment is without restriction to this.
It should be understood that being shown as after capacitor residual voltage refers to capacitor power-off wherein the charge stored will not disappear immediately
Capacitor electrification, corresponding voltage is exactly capacitor residual voltage, when the capacitance present residual voltage value is less than the current electric grid Voltage Peak
When value, in order to further increase the accuracy of switching, in conjunction with the phase for judging current electric grid voltage-phase and capacitance present phase
Difference whether within the scope of predetermined angle as whether the Rule of judgment of switching.
In the concrete realization, it can generally determine that voltage-phase is just half by voltage-phase decision circuitry shown in Fig. 3
Axis or negative semiaxis, Fig. 3 are TSC operation/cutting method voltage-phase decision circuitry schematic diagram of the present invention, the voltage-phase decision circuitry
Enhance circuit Z3 including voltage sampling circuit Z1, isolation circuit Z2 and power, the voltage sampling circuit Z1 includes alternating current
AC1, AC2, AC3 and ACC, resistance R1, resistance R2, resistance R1, diode D1 and diode D2, resistance R1 and resistance R2 simultaneously couple
Enter one end of diode D1, resistance R4 is connected with one end of diode D2, one end of diode D1 and the one of photoelectrical coupler G1
End is connected, and the other end of diode D1 is connected with the other end of photoelectrical coupler G1, one end of diode D2 and photoelectrical coupler
One end of G2 is connected, and the other end of diode D2 is connected with the other end of photoelectrical coupler G2, the output end of photoelectrical coupler G1
It is connected after being connected with resistance R3 and capacitor C1 with phase inverter F1, the output end of photoelectrical coupler G2 is connected with resistance R5 and capacitor C2
It is connected afterwards with phase inverter F2, for the voltage sampling circuit Z1 for acquiring current electric grid voltage, the isolation circuit Z2 includes light
Electric coupler G1 and photoelectrical coupler G2, the isolation circuit Z2 increase for the voltage sampling circuit Z1 and the power to be isolated
Forceful electric power road Z3, the power enhancing circuit Z3 includes supply voltage VCC, resistance R3, resistance R4, capacitor C1, capacitor C2, phase inverter
F1, the input terminal that phase inverter F2, AB-SYN and BC-SYN are capacitor AB and BC, judge electricity by voltage-phase shown in Fig. 3
Road, can accurate judgement voltage-phase, so as to the investment and excision of further independent control capacitive coupling device AB and BC, into
And compensated to three-phase imbalance is idle, improve the accuracy of switching.
Step S30, when the phase difference value is within the scope of the predetermined angle, to target thyristor switchable capacitor
TSC sends pulse signal, so that target TSC is connected after receiving pulse signal.
It is understood that when receiving switching signal, if the capacitance present residual voltage value is less than the current electric grid
Voltage peak, and the current electric grid voltage-phase and the phase difference value of the capacitance present phase are in the predetermined angle
When in range, pulse signal is sent to target TSC, so that target TSC is connected after receiving pulse signal, it can be accurate
Carry out switching, and investment will not be generated and shoved, the switching time shortens, and improves switching speed and efficiency.
Correspondingly, the step S30 specifically includes the following steps:
When the phase difference value is within the scope of the predetermined angle, according to determining predetermined pulse transmit cycle to target
TSC sends pulse signal, so that target TSC is connected after receiving pulse signal.
It should be understood that meet switching condition when the phase difference value is within the scope of the predetermined angle, according to
Determining predetermined pulse transmit cycle sends pulse signal to corresponding TSC, i.e., sends pulse signal, energy to the target TSC
The target TSC is connected after receiving pulse signal, the target TSC no-flashy-flow generates, and the target TSC is led
It is in running order after logical.
Technical solution provided in this embodiment judges that capacitance present is residual through terminal device when receiving switching signal
Whether pressure value is less than current electric grid voltage peak, when the capacitance present residual voltage value is less than the current electric grid voltage peak,
The phase difference value of current electric grid voltage-phase and capacitance present phase is judged whether within the scope of predetermined angle, when the phase difference
When value is within the scope of the predetermined angle, pulse signal is sent to target thyristor switchable capacitor TSC, so that target TSC exists
It is connected after receiving pulse signal, can be improved the accuracy of zero passage detection, shortened the switching time, improve switching speed
And efficiency, and avoid generation investment and shove and power grid is impacted.
Further, Fig. 4 is the flow diagram of TSC operation/cutting method second embodiment of the present invention, as shown in figure 4, being based on
First embodiment proposes TSC operation/cutting method second embodiment of the present invention, in the present embodiment, described after the step S30
TSC operation/cutting method is further comprising the steps of:
Step S40, the loop current instantaneous value for acquiring the target TSC in real time, according to the loop current instantaneous value meter
It calculates and obtains current effective value and electric current total harmonic distortion.
It should be noted that the loop current instantaneous value is the transient current being formed into a loop after the target TSC is connected,
Transient current is the electric energy of moment height outburst, is a kind of Instantaneous State and distortion shape that AC sine wave circuit powers on stream and voltage
State, main feature are super-pressure, Instantaneous State and frequency conversion time, can be calculated according to the loop current instantaneous value and obtain the electricity
Virtual value and electric current total harmonic distortion are flowed, the current effective value refers to passes through similar resistance for a direct current and an alternating current respectively
Resistance just say that the current value of this direct current is this if the heat that two electric currents are generated by resistance in same time is identical
The virtual value of one alternating current, the current total harmonic distortion rate refer to harmonic current root-mean-square valve and fundamental current root-mean-square valve it
The percentage of ratio.
It is understood that after the loop current instantaneous value of the target TSC of acquisition acquisition in real time, according to the circuit electricity
It flows instantaneous value and calculates acquisition current effective value and electric current total harmonic distortion, so that the current quality situation to the target TSC carries out
Detection judgement reduces capacitor risk easy to damage.
In the concrete realization, the mesh can be acquired by the oscilloscope module or pulse capture device module of memory-type in real time
The loop current instantaneous value for marking TSC, can also acquire the loop current instantaneous value of the target TSC by other means certainly,
The present embodiment is without restriction to this.
Step S50, when the electric current total harmonic distortion is greater than default aberration rate, zero passage is carried out according to the current effective value
Excision and harmonic wave transfinite protection.
It should be noted that the electric current total harmonic distortion THDi=IH/I1*100%, wherein IH is harmonic current content,
Quadratic sum equal to all subharmonic currents opens radical sign again, and I1 is fundamental current virtual value；The default aberration rate is to set in advance
The aberration rate set, the value usually defaulted are also possible to be adjusted setting according to practical situations, naturally it is also possible to be root
The default aberration rate is determined according to other modes, and the present embodiment is without restriction to this.
It is understood that the amplitude of signal is variation, variation in unit time T for sinusoidal ac signal
Number be exactly signal frequency, and inside each period, current signal all can 2 times by zero point, this is current over-zero, generally
For detecting the frequency of signal, operating passing zero refers to voltage zero-cross investment and current over-zero excision, the voltage and electric current of capacitor
There is 90 degree of phase difference, therefore disconnected the peak value moment of certain phase voltage (certain phase current is zero), so that it may realize capacitor electricity
Flow through zero excision.To realize make and break contact without electric arc disjunction, when the electric current total harmonic distortion is greater than default aberration rate, root
Zero passage excision is carried out according to the current effective value, it is various because of harm caused by high current not will cause arcing etc..
It should be understood that the harmonic wave transfinites, protection refers to when the electric current total harmonic distortion is greater than default aberration rate,
Harmonic wave control is carried out to the target TSC, business harmonic distortion will lead to power transformer fever, power cable fever, low pressure
Controller switching equipment operation irregularity and interference to electronic equipment, therefore needed when the electric current total harmonic distortion is greater than default aberration rate
Harmonic wave control is carried out in time, and the mode of harmonic wave control can be the power quality for improving harmonic wave equipment, be also possible to power grid
Harmonic wave is filtered, and can also be design specialized loop power supply certainly, or avoids the modes memory harmonic waves such as spatial electromagnetic interference
It administers, the present embodiment is without restriction to this.
In the concrete realization, the default aberration rate can be set to 15%, when the electric current total harmonic distortion is greater than 15%
When, it is administered, i.e., carrying out zero passage excision and harmonic wave according to the current effective value transfinites protection, transfinites protection in progress harmonic wave
When, it can also be without restriction to this with reference to other parameters, the present embodiment such as the default allowable harmonic currents of each harmonic.
Technical solution provided in this embodiment, by acquiring the loop current instantaneous value of the target TSC in real time, according to institute
It states loop current instantaneous value and calculates acquisition current effective value and electric current total harmonic distortion, when the electric current total harmonic distortion is abnormal greater than presetting
When variability, carrying out zero passage excision and harmonic wave according to the current effective value transfinites protection, increases capacitance current and detects, passes through electricity
Stream virtual value, which is able to carry out effective harmonic wave, to transfinite protection, and real-time monitoring acquires the quality condition of current flow, can protect
Capacitor and thyristor are not damaged because overcurrent or harmonic current are exceeded, delay the service life of capacitor.
Further, Fig. 5 is the flow diagram of TSC operation/cutting method 3rd embodiment of the present invention, as shown in figure 5, being based on
Second embodiment proposes TSC operation/cutting method 3rd embodiment of the present invention, in the present embodiment, described after the step S50
TSC operation/cutting method is further comprising the steps of:
Step S60, when detecting no switching signal, stop issuing the pulse signal, and record current phase parameter,
For the use of next switching.
It should be noted that generally can detect whether switching signal by input terminal, when detecting no switching signal
When, stop issuing the pulse signal, and record current relevant phase parameter, the current phase parameter, which can be, works as
Preceding capacitive phase parameter, is also possible to current voltage phase parameter, can also be other kinds of phase parameter, this implementation certainly
Example is without restriction to this.
It is understood that stopping issuing the pulse signal, and record current phase when detecting no switching signal
Parameter, for next switching use, can effectively shorten it is secondary excision, making time time interval, further shorten switching
Time improves switching speed and efficiency.
In the concrete realization, the temperature that can use target TSC described in thermistor real-time monitoring can be moved according to temperature
State, which adjusts terminal device, for example can be the revolving speed of DC fan, realize variable speed, advantageously reduce internal dust accumulation, and
And reduce power consumption and noise.
Technical solution provided in this embodiment issues the pulse signal by stopping when detecting no switching signal,
And record current phase parameter, for next switching use, can effectively shorten it is secondary excision, making time time interval,
Further shorten the switching time, improves switching speed and efficiency.
Further, Fig. 6 is the flow diagram of TSC operation/cutting method fourth embodiment of the present invention, as shown in fig. 6, being based on
3rd embodiment proposes TSC operation/cutting method fourth embodiment of the present invention, in the present embodiment, described before the step S60
TSC operation/cutting method is further comprising the steps of:
Step S601, the target voltage values for acquiring the target TSC in real time, when the target voltage values are greater than predeterminated voltage
When threshold value, overvoltage protection is carried out to the target TSC.
It should be noted that the predetermined voltage threshold is preset voltage value, the voltage value of default can be,
It can be the predetermined voltage threshold determined according to practical situations, can also be the predeterminated voltage threshold that other modes determine certainly
Value, the present embodiment are without restriction to this.
It is understood that the characteristics of because of TSC itself, do not allow to trigger thyristor when over-voltage occurs, such as
Fruit may cause the damage of thyristor gate leve in high pressure time trigger thyristor base friend, it is therefore desirable to carry out to the target TSC
Pressure protection, the basic reason of TSC over-voltage are that loop resistance is too small, and inductance, capacitive energy oscillation exchange occur for circuit, in capacitor
Oscillation overvoltage is formed on device can have if in time discharged rapidly inductive energy storage using energy absorption or bleed off device
Effect protects thyristor valve to damage from over-voltage breakdown.
It in the concrete realization, can be by the capacitance voltage sample circuit built in the terminal device, by described in real time
The target voltage values of target TSC carry out over-voltage to the target TSC when the target voltage values are greater than predetermined voltage threshold
Protection.
Correspondingly, after the step S601, the TSC operation/cutting method further include:
Step S602, the target current value for acquiring current electric grid voltage value and the target TSC, according to the current electric grid
Voltage value and the target current value calculate the actual capacity for obtaining the target TSC.
Step S603, when the actual capacity is less than preset capacity, alarm prompt is carried out.
It is understood that the target current value of acquisition current electric grid voltage value and the target TSC, according to described current
Network voltage value and the target current value calculate the actual capacity for obtaining the target TSC, and then when the actual capacity is small
When preset capacity, alarm prompt is carried out, the speed and efficiency of switching can be effectively promoted.
In the concrete realization, the actual capacity of capacitor can be calculated by detection network voltage and condenser current,
Situations such as condenser capacity decays, three-phase capacitor capacity tolerance is larger, can be judged and be alerted.
Technical solution provided in this embodiment, by acquiring the target voltage values of the target TSC in real time, when the target
When voltage value is greater than predetermined voltage threshold, overvoltage protection is carried out to the target TSC, acquires current electric grid voltage value and the mesh
The target current value for marking TSC calculates according to the current electric grid voltage value and the target current value and obtains the target TSC's
Actual capacity carries out alarm prompt when the actual capacity is less than preset capacity, can carry out real-time guard to capacitor,
Capacitor spoilage is reduced, the service life of delay capacitor is conducive to.
In addition, the embodiment of the present invention also proposes a kind of computer readable storage medium, the computer readable storage medium
On be stored with TSC switching program, following operation is realized when the TSC switching program is executed by processor:
When receiving switching signal, judge whether capacitance present residual voltage value is less than current electric grid voltage peak；
When the capacitance present residual voltage value be less than the current electric grid voltage peak when, judge current electric grid voltage-phase and
Whether the phase difference value of capacitance present phase is within the scope of predetermined angle；
When the phase difference value is within the scope of the predetermined angle, arteries and veins is sent to target thyristor switchable capacitor TSC
Signal is rushed, so that target TSC is connected after receiving pulse signal.
Further, following operation is also realized when the TSC switching program is executed by processor:
The loop current instantaneous value for acquiring the target TSC in real time calculates according to the loop current instantaneous value and obtains electricity
Flow virtual value and electric current total harmonic distortion；
When the electric current total harmonic distortion is greater than default aberration rate, zero passage excision and humorous is carried out according to the current effective value
Wave transfinites protection.
Further, following operation is also realized when the TSC switching program is executed by processor:
When detecting no switching signal, stop issuing the pulse signal, and record current phase parameter, for next time
Switching uses.
Further, following operation is also realized when the TSC switching program is executed by processor:
The target voltage values for acquiring the target TSC in real time are right when the target voltage values are greater than predetermined voltage threshold
The target TSC carries out overvoltage protection.
Further, following operation is also realized when the TSC switching program is executed by processor:
The target current value for acquiring current electric grid voltage value and the target TSC, according to the current electric grid voltage value and
The target current value calculates the actual capacity for obtaining the target TSC；
When the actual capacity is less than preset capacity, alarm prompt is carried out.
Further, following operation is also realized when the TSC switching program is executed by processor:
Obtain current electric grid voltage-phase value, capacitance present phase value and current pulse length；
Phase difference value is calculated according to the current electric grid voltage-phase value and the capacitance present phase value, is worked as according to described
Prepulse width determines predetermined pulse transmit cycle and current electric grid voltage peak.
Further, following operation is also realized when the TSC switching program is executed by processor:
When the phase difference value is within the scope of the predetermined angle, according to determining predetermined pulse transmit cycle to target
TSC sends pulse signal, so that target TSC is connected after receiving pulse signal.
Further, following operation is also realized when the TSC switching program is executed by processor:
When the capacitance present residual voltage value is not less than the current electric grid voltage peak, the judgement capacitance present is returned
Whether residual voltage value is less than the step of current electric grid voltage peak.
Technical solution provided in this embodiment judges that capacitance present is residual through terminal device when receiving switching signal
Whether pressure value is less than current electric grid voltage peak, when the capacitance present residual voltage value is less than the current electric grid voltage peak,
The phase difference value of current electric grid voltage-phase and capacitance present phase is judged whether within the scope of predetermined angle, when the phase difference
When value is within the scope of the predetermined angle, pulse signal is sent to target thyristor switchable capacitor TSC, so that target TSC exists
It is connected after receiving pulse signal, can be improved the accuracy of zero passage detection, shortened the switching time, improve switching speed
And efficiency, and avoid generation investment and shove and power grid is impacted.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the system that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or system institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or system.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of TSC operation/cutting method, which is characterized in that the TSC operation/cutting method includes:
Terminal device judges whether capacitance present residual voltage value is less than current electric grid voltage peak when receiving switching signal；
When the capacitance present residual voltage value is less than the current electric grid voltage peak, current electric grid voltage-phase and current is judged
Whether the phase difference value of capacitive phase is within the scope of predetermined angle；
When the phase difference value is within the scope of the predetermined angle, pulse letter is sent to target thyristor switchable capacitor TSC
Number, so that target TSC is connected after receiving pulse signal.
2. TSC operation/cutting method as described in claim 1, which is characterized in that described when the phase difference value is in the preset angle
When spending in range, pulse signal is issued according to predetermined pulse transmit cycle, makes target thyristor switchable capacitor TSC that it is connected
Afterwards, the TSC operation/cutting method further include:
The loop current instantaneous value for acquiring the target TSC in real time, calculating acquisition electric current according to the loop current instantaneous value has
Valid value and electric current total harmonic distortion；
When the electric current total harmonic distortion is greater than default aberration rate, zero passage excision is carried out according to the current effective value and harmonic wave is super
Limit protection.
3. TSC operation/cutting method as claimed in claim 2, which is characterized in that described to be preset when the electric current total harmonic distortion is greater than
When aberration rate, carrying out zero passage excision and harmonic wave according to the current effective value transfinites after protection, and the TSC operation/cutting method also wraps
It includes:
When detecting no switching signal, stop issuing the pulse signal, and record current phase parameter, for next switching
It uses.
4. TSC operation/cutting method as claimed in claim 3, which is characterized in that it is described when detecting no switching signal, stop hair
The pulse signal out, and current phase parameter is recorded, before next switching use, the TSC operation/cutting method further include:
The target voltage values for acquiring the target TSC in real time, when the target voltage values are greater than predetermined voltage threshold, to described
Target TSC carries out overvoltage protection.
5. TSC operation/cutting method as claimed in claim 4, which is characterized in that the target electricity for acquiring the target TSC in real time
Pressure value, when the target voltage values are greater than predetermined voltage threshold, after carrying out overvoltage protection to the target TSC, the TSC
Operation/cutting method further include:
The target current value for acquiring current electric grid voltage value and the target TSC, according to the current electric grid voltage value and described
Target current value calculates the actual capacity for obtaining the target TSC；
When the actual capacity is less than preset capacity, alarm prompt is carried out.
6. TSC operation/cutting method according to any one of claims 1 to 5, which is characterized in that described to receive switching signal
When, judge whether capacitance present residual voltage value is less than before current electric grid voltage peak, the TSC operation/cutting method further include:
Obtain current electric grid voltage-phase value, capacitance present phase value and current pulse length；
Phase difference value is calculated according to the current electric grid voltage-phase value and the capacitance present phase value, according to the current arteries and veins
It rushes width and determines predetermined pulse transmit cycle and current electric grid voltage peak.
7. TSC operation/cutting method as claimed in claim 6, which is characterized in that described when the phase difference value is in the preset angle
When spending in range, pulse signal is sent to target thyristor switchable capacitor TSC, so that target TSC is receiving pulse signal
After be connected, specifically include:
When the phase difference value is within the scope of the predetermined angle, according to determining predetermined pulse transmit cycle to target TSC
Pulse signal is sent, so that target TSC is connected after receiving pulse signal.
8. TSC operation/cutting method according to any one of claims 1 to 5, which is characterized in that described to receive switching signal
When, judge whether capacitance present residual voltage value is less than after current electric grid voltage peak, the TSC operation/cutting method further include:
When the capacitance present residual voltage value is not less than the current electric grid voltage peak, the judgement capacitance present residual voltage is returned
The step of whether value is less than current electric grid voltage peak.
9. a kind of terminal device, which is characterized in that the terminal device includes: memory, processor and is stored in the storage
On device and the TSC switching program that can run on the processor, the TSC switching program are arranged for carrying out such as claim 1
To described in any one of 8 the step of TSC operation/cutting method.
10. a kind of computer readable storage medium, which is characterized in that be stored with TSC throwing on the computer readable storage medium
Program is cut, such as the switching side TSC described in any item of the claim 1 to 8 is realized when the TSC switching program is executed by processor
The step of method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810927971.9A CN108964080A (en) | 2018-08-15 | 2018-08-15 | TSC operation/cutting method, terminal device and computer readable storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810927971.9A CN108964080A (en) | 2018-08-15 | 2018-08-15 | TSC operation/cutting method, terminal device and computer readable storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108964080A true CN108964080A (en) | 2018-12-07 |
Family
ID=64469082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810927971.9A Pending CN108964080A (en) | 2018-08-15 | 2018-08-15 | TSC operation/cutting method, terminal device and computer readable storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108964080A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110618308A (en) * | 2019-10-18 | 2019-12-27 | Tcl空调器(中山)有限公司 | Single-phase alternating-current voltage zero point detection method and device |
| CN112014676A (en) * | 2020-09-11 | 2020-12-01 | 西安高压电器研究院有限责任公司 | Switching test device for capacitor device type test |
| CN114073000A (en) * | 2019-06-28 | 2022-02-18 | 东芝三菱电机产业系统株式会社 | Power conversion device and method for driving power conversion device |
| CN114268111A (en) * | 2022-03-03 | 2022-04-01 | 东方博沃（北京）科技有限公司 | Zero-crossing detection method, device, equipment and storage medium |
| CN114073000B (en) * | 2019-06-28 | 2024-05-10 | 东芝三菱电机产业系统株式会社 | Power conversion device and method for driving power conversion device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102347616A (en) * | 2011-09-21 | 2012-02-08 | 山东大学 | Reactive compensation method with resonance detection and harmonic wave overcurrent protection and device thereof |
| CN104345217A (en) * | 2013-08-02 | 2015-02-11 | 艾默生网络能源有限公司 | Detection method and device for capacitance value |
| CN104466991A (en) * | 2014-12-24 | 2015-03-25 | 安徽天沃电气技术有限公司 | Control method for novel thyristor-fast-switched capacitor banks |
| CN205489538U (en) * | 2016-01-12 | 2016-08-17 | 天津威瀚电气股份有限公司 | Economize on electricity energy storage type dynamic reactive power compensation device |
| CN206099354U (en) * | 2016-09-20 | 2017-04-12 | 深圳市禾望电气股份有限公司 | Capacitor switching switch |
-
2018
- 2018-08-15 CN CN201810927971.9A patent/CN108964080A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102347616A (en) * | 2011-09-21 | 2012-02-08 | 山东大学 | Reactive compensation method with resonance detection and harmonic wave overcurrent protection and device thereof |
| CN104345217A (en) * | 2013-08-02 | 2015-02-11 | 艾默生网络能源有限公司 | Detection method and device for capacitance value |
| CN104466991A (en) * | 2014-12-24 | 2015-03-25 | 安徽天沃电气技术有限公司 | Control method for novel thyristor-fast-switched capacitor banks |
| CN205489538U (en) * | 2016-01-12 | 2016-08-17 | 天津威瀚电气股份有限公司 | Economize on electricity energy storage type dynamic reactive power compensation device |
| CN206099354U (en) * | 2016-09-20 | 2017-04-12 | 深圳市禾望电气股份有限公司 | Capacitor switching switch |
Non-Patent Citations (1)
| Title |
|---|
| 毕治军: "高压TSC无功补偿技术的研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114073000A (en) * | 2019-06-28 | 2022-02-18 | 东芝三菱电机产业系统株式会社 | Power conversion device and method for driving power conversion device |
| CN114073000B (en) * | 2019-06-28 | 2024-05-10 | 东芝三菱电机产业系统株式会社 | Power conversion device and method for driving power conversion device |
| CN110618308A (en) * | 2019-10-18 | 2019-12-27 | Tcl空调器(中山)有限公司 | Single-phase alternating-current voltage zero point detection method and device |
| CN110618308B (en) * | 2019-10-18 | 2021-11-09 | Tcl空调器(中山)有限公司 | Single-phase alternating-current voltage zero point detection method and device |
| CN112014676A (en) * | 2020-09-11 | 2020-12-01 | 西安高压电器研究院有限责任公司 | Switching test device for capacitor device type test |
| CN112014676B (en) * | 2020-09-11 | 2023-10-13 | 西安高压电器研究院股份有限公司 | Switching test device for capacitor device type test |
| CN114268111A (en) * | 2022-03-03 | 2022-04-01 | 东方博沃（北京）科技有限公司 | Zero-crossing detection method, device, equipment and storage medium |
| CN114268111B (en) * | 2022-03-03 | 2022-06-03 | 东方博沃（北京）科技有限公司 | Zero-crossing detection method, device, equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101944855B (en) | Digital control power supply converter for kitchen range | |
| CN101325367B (en) | Circuit for correcting part active power factor | |
| CN108964080A (en) | TSC operation/cutting method, terminal device and computer readable storage medium | |
| CN102419562B (en) | Control method of relay with inductive load, and household appliance | |
| CN101604853A (en) | Battery charge and discharge device | |
| CN207183168U (en) | A kind of relay with Super-zero control circuit | |
| CN113466653B (en) | Multifunctional thyristor switching switch detection method | |
| CN204858571U (en) | Low pressure reactive power compensator | |
| CN103441511A (en) | Intelligent low-voltage dynamic-compensation energy-saving filtering device | |
| CN201312125Y (en) | Composite power factor compensation harmonic elimination controller | |
| CN202474863U (en) | Low voltage filtering type dynamic reactive power compensation device | |
| CN201699454U (en) | Self-feeding electric energy recycling system of crane | |
| CN204515032U (en) | A kind of proving installation of energy feedback unit | |
| CN104158197B (en) | A kind of line voltage compensation method based on SVG | |
| CN103023040A (en) | Secondary low-pressure dynamic compensation device for remote wireless monitoring of high-power submerged arc furnace | |
| CN213875936U (en) | Solid-state circuit breaker test experimental device | |
| CN211456704U (en) | Anti-interference combination switch | |
| CN208571590U (en) | A kind of high-voltage large current pulse power with adjustable over-current detection | |
| CN203747426U (en) | Low-voltage dynamic filtering reactive compensation device | |
| CN2810090Y (en) | An electromagnetic oven controller with novel protection circuit | |
| CN103124146B (en) | Control method and system for improving supply apparatus to hold load | |
| CN209120077U (en) | A kind of uninterruptible power supply inverter output circuit of resistance to load shock | |
| CN101888107A (en) | Self-feeding type electric energy recovering system and method of hoist | |
| CN101667736B (en) | Three-stage brushless micro gas turbine electricity generation grid-connecting device and grid connecting method | |
| CN202218020U (en) | Phase-control-type reactive power dynamic compensating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181207 |